Communication of uplink control information

ABSTRACT

Various aspects of the disclosure relate to communicating uplink control information. As one example, a user equipment may send uplink control information to a base station. In some aspects, the number of symbols used to communicate the uplink control information may be based on a link gain associated with the UE and/or based on a payload size of the uplink control information. As another example, the user equipment may send channel information for a number of beams to the base station. In some aspects, the number of beams may be based on the type of channel that is used to send the uplink control information.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation of patent application Ser. No.15/242,194 filed in the U.S. Patent and Trademark Office on Aug. 19,2016, which claims priority to and the benefit of provisional patentapplication No. 62/297,863 filed in the U.S. Patent and Trademark Officeon Feb. 20, 2016, provisional patent application No. 62/314,959 filed inthe U.S. Patent and Trademark Office on Mar. 29, 2016, and provisionalpatent application No. 62/327,436 filed in the U.S. Patent and TrademarkOffice on Apr. 25, 2016, the entire content of each of which isincorporated herein by reference.

INTRODUCTION

Various aspects described herein relate to wireless communication and,more particularly but not exclusively, to communicating uplink controlinformation.

In some multiple access wireless communication systems, several devicescommunicate with a base station. In some scenarios, the base station isequipped with multiple transmit antennas and multiple receive antennas.One example is a millimeter wave (mmW) system where multiple antennasare used for beamforming (e.g., in the range of 30 GHz, 60 GHz, etc.).Such a base station may communicate with the devices in atime-division-multiplexing (TDM) or time-division-duplexing (TDD) mannerThat is, the base station transmits to a first device in a first timeinterval and then to a second device subsequently in a second timeinterval. Often, the beamforming directions to these two devices aredistinct. As a result, the base station may change its beamformingsetting from the first time interval to the second time interval.

FIG. 1 illustrates a communication system 100 where a mmW base station(BS) 102 communicates with a first mmW user equipment (UE) 104 and asecond mmW UE 106 via different beamforming directions. As indicated bya set of beams 108, the mmW base station 102 may communicate via any oneof a plural of directional beams. As indicated by a set of beams 110,the first mmW UE 104 may communicate via any one of a plural ofdirectional beams. As indicated by a set of beams 112, the second mmW UE106 may communicate via any one of a plural of directional beams. Forexample, the base station 102 may communicate with the first mmW UE 104via a first beamforming direction 114 and communicate with the secondmmW UE 106 via a second beamforming direction 116.

In millimeter wave systems, it is desirable for uplink (UL) receive (RX)beamforming that is used to receive a sounding reference signal (SRS) tobe UE-specific. In this way, a base station may obtain a more accurateestimate of the channel between the UE and the base station. On theother hand, UL RX beamforming to receive channel quality information(CQI), ACK/NAK, a scheduling request (SR), etc., does not have to beUE-specific. Moreover, an SR can come from UEs located in any angularregion. If a base station performs UE-specific UL RX beamforming toreceive SRS, the base station might not receive an SR from UEs that arelocated in a different angular region in the same symbol.

SUMMARY

The following presents a simplified summary of some aspects of thedisclosure to provide a basic understanding of such aspects. Thissummary is not an extensive overview of all contemplated features of thedisclosure, and is intended neither to identify key or critical elementsof all aspects of the disclosure nor to delineate the scope of any orall aspects of the disclosure. Its sole purpose is to present variousconcepts of some aspects of the disclosure in a simplified form as aprelude to the more detailed description that is presented later.

In one aspect, the disclosure provides an apparatus configured forcommunication that includes a memory device and a processing circuitcoupled to the memory device. The processing circuit is configured to:determine a quantity of symbols to communicate uplink controlinformation, wherein the quantity of symbols is based on a link gain ofa user equipment (UE); and communicate the uplink control informationusing the determined quantity of symbols.

Another aspect of the disclosure provides a method for communicationincluding: determining a quantity of symbols to communicate uplinkcontrol information, wherein the quantity of symbols is based on a linkgain of a user equipment (UE); and communicating the uplink controlinformation using the determined quantity of symbols.

Another aspect of the disclosure provides an apparatus configured forcommunication. The apparatus including: means for determining a quantityof symbols to communicate uplink control information, wherein thequantity of symbols is based on a link gain of a user equipment (UE);and means for communicating the uplink control information using thedetermined quantity of symbols.

Another aspect of the disclosure provides a non-transitorycomputer-readable medium storing computer-executable code, includingcode to: determine a quantity of symbols to communicate uplink controlinformation, wherein the quantity of symbols is based on a link gain ofa user equipment (UE); and communicate the uplink control informationusing the determined quantity of symbols.

In one aspect, the disclosure provides an apparatus configured forcommunication that includes a memory device and a processing circuitcoupled to the memory device. The processing circuit is configured to:determine a quantity of symbols to communicate uplink controlinformation, wherein the quantity of symbols is based on a payload sizeof the uplink control information; and communicate the uplink controlinformation using the determined quantity of symbols.

Another aspect of the disclosure provides a method for communicationincluding: determining a quantity of symbols to communicate uplinkcontrol information, wherein the quantity of symbols is based on apayload size of the uplink control information; and communicating theuplink control information using the determined quantity of symbols.

Another aspect of the disclosure provides an apparatus configured forcommunication. The apparatus including: means for determining a quantityof symbols to communicate uplink control information, wherein thequantity of symbols is based on a payload size of the uplink controlinformation; and means for communicating the uplink control informationusing the determined quantity of symbols.

Another aspect of the disclosure provides a non-transitorycomputer-readable medium storing computer-executable code, includingcode to: determine a quantity of symbols to communicate uplink controlinformation, wherein the quantity of symbols is based on a payload sizeof the uplink control information; and communicate the uplink controlinformation using the determined quantity of symbols.

In one aspect, the disclosure provides an apparatus configured forcommunication that includes a memory device and a processing circuitcoupled to the memory device. The processing circuit is configured to:determine a quantity of beams for which channel information istransmitted to a base station, wherein the quantity of beams is based onwhether uplink control information (UCI) is transmitted via a physicaluplink control channel (PUCCH) or a physical uplink shared channel(PUSCH); and communicate the channel information for the determinedquantity of beams.

Another aspect of the disclosure provides a method for communicationincluding: determining a quantity of beams for which channel informationis transmitted to a base station, wherein the quantity of beams is basedon whether uplink control information (UCI) is transmitted via aphysical uplink control channel (PUCCH) or a physical uplink sharedchannel (PUSCH); and communicating the channel information for thedetermined quantity of beams.

Another aspect of the disclosure provides an apparatus configured forcommunication. The apparatus including: means for determining a quantityof beams for which channel information is transmitted to a base station,wherein the quantity of beams is based on whether uplink controlinformation (UCI) is transmitted via a physical uplink control channel(PUCCH) or a physical uplink shared channel (PUSCH); and means forcommunicating the channel information for the determined quantity ofbeams.

Another aspect of the disclosure provides a non-transitorycomputer-readable medium storing computer-executable code, includingcode to: determine a quantity of beams for which channel information istransmitted to a base station, wherein the quantity of beams is based onwhether uplink control information (UCI) is transmitted via a physicaluplink control channel (PUCCH) or a physical uplink shared channel(PUSCH); and communicate the channel information for the determinedquantity of beams.

These and other aspects of the disclosure will become more fullyunderstood upon a review of the detailed description, which follows.Other aspects, features, and implementations of the disclosure willbecome apparent to those of ordinary skill in the art, upon reviewingthe following description of specific implementations of the disclosurein conjunction with the accompanying figures. While features of thedisclosure may be discussed relative to certain implementations andfigures below, all implementations of the disclosure can include one ormore of the advantageous features discussed herein. In other words,while one or more implementations may be discussed as having certainadvantageous features, one or more of such features may also be used inaccordance with the various implementations of the disclosure discussedherein. In similar fashion, while certain implementations may bediscussed below as device, system, or method implementations it shouldbe understood that such implementations can be implemented in variousdevices, systems, and methods.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are presented to aid in the description ofaspects of the disclosure and are provided solely for illustration ofthe aspects and not limitations thereof.

FIG. 1 is a diagram of an example communication system employingbeamforming within which aspects of the disclosure may be implemented.

FIG. 2 is a block diagram of an example communication system forcommunicating UL control information in accordance with some aspects ofthe disclosure.

FIG. 3 is a block diagram of an example communication system forcommunicating channel information in accordance with some aspects of thedisclosure.

FIG. 4 is a diagram of an example communication system employingsounding reference signal (SRS) and UL control information communicationin accordance with some aspects of the disclosure.

FIG. 5 is a diagram of an example of a self-contained downlink (DL)sub-frame structure in accordance with some aspects of the disclosure.

FIG. 6 is a diagram of an example of a DL sub-frame for certain types ofUEs in accordance with some aspects of the disclosure.

FIG. 7 is a diagram of an example of a sub-frame with two UL controlsymbols in accordance with some aspects of the disclosure.

FIG. 8 is a diagram of an example of DL centric and UL centric sub-frameformats in accordance with some aspects of the disclosure.

FIG. 9 is a diagram of another example of DL centric and UL centricsub-frame formats in accordance with some aspects of the disclosure.

FIG. 10 is a diagram of an example of sub-frames including differentquantities of uplink control symbols in accordance with some aspects ofthe disclosure.

FIG. 11 is a diagram of an example of sub-frame that carriers of uplinkcontrol information in PUSCH in accordance with some aspects of thedisclosure.

FIG. 12 is a diagram of examples of BRS sweeps in accordance with someaspects of the disclosure.

FIG. 13 is a diagram of an example of a synchronization sub-frame inaccordance with some aspects of the disclosure.

FIG. 14 is a diagram of an example of beam refinement in accordance withsome aspects of the disclosure.

FIG. 15 is a diagram of another example of beam refinement in accordancewith some aspects of the disclosure.

FIG. 16 is a block diagram illustrating an example hardwareimplementation for an apparatus (e.g., an electronic device) that cansupport communication in accordance with some aspects of the disclosure.

FIG. 17 is a flowchart illustrating an example of a process forcommunicating uplink (UL) control information in accordance with someaspects of the disclosure.

FIG. 18 is a flowchart illustrating an example of another process forcommunicating uplink (UL) control information in accordance with someaspects of the disclosure.

FIG. 19 is a flowchart illustrating an example of another process forcommunicating an SRS in accordance with some aspects of the disclosure.

FIG. 20 is a flowchart illustrating an example of a process forcommunicating an SRS in accordance with some aspects of the disclosure.

FIG. 21 is a flowchart illustrating an example of a process fortransmitting UL control information in accordance with some aspects ofthe disclosure.

FIG. 22 is a flowchart illustrating an example of a process fortransmitting information at particular symbol locations in accordancewith some aspects of the disclosure.

FIG. 23 is a flowchart illustrating an example of a process fortransmitting information at particular tone locations in accordance withsome aspects of the disclosure.

FIG. 24 is a flowchart illustrating an example of a process for sendinga scheduling indication in accordance with some aspects of thedisclosure.

FIG. 25 is a flowchart illustrating an example of another process forsending a scheduling indication in accordance with some aspects of thedisclosure.

FIG. 26 is a flowchart illustrating an example of a process forcommunicating via particular symbol locations in accordance with someaspects of the disclosure.

FIG. 27 is a flowchart illustrating an example of a process forcommunicating via particular tone locations in accordance with someaspects of the disclosure.

FIG. 28 is a flowchart illustrating an example of a process forallocating symbols in accordance with some aspects of the disclosure.

FIG. 29 is a block diagram illustrating an example hardwareimplementation for another apparatus (e.g., an electronic device) thatcan support communication in accordance with some aspects of thedisclosure.

FIG. 30 is a flowchart illustrating an example of a process forcommunicating channel information in accordance with some aspects of thedisclosure.

FIG. 31 is a flowchart illustrating an example of a process for sendingfeedback over a determined number of beams in accordance with someaspects of the disclosure.

FIG. 32 is a flowchart illustrating an example of another process forsending feedback over a determined number of beams in accordance withsome aspects of the disclosure.

FIG. 33 is a flowchart illustrating an example of a scheduling processin accordance with some aspects of the disclosure.

FIG. 34 is a flowchart illustrating an example of another process forspecifying a quantity of beams in accordance with some aspects of thedisclosure.

FIG. 35 is a flowchart illustrating an example of a process forselecting a channel in accordance with some aspects of the disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure relate to communicating uplink controlinformation. In some aspects, the uplink control information providesfeedback for beamformed communication.

FIG. 2 illustrates a communication system 200 where a UE 202 sendsuplink control information 206 to a base station 204. The number ofsymbols used to communicate the uplink control information 206 may bebased on a link gain associated with the UE and/or based on a payloadsize of the uplink control information 206. To this end, the basestation 204 includes a processor 208 for determining the number ofsymbols used by or to be used by the UE 202 to send the uplink controlinformation 206. In the latter case, the processor 208 may select thenumber of symbols based on link gain and/or payload size informationacquired by the base station 204 and then use a transceiver 210 to sendan indication 212 of the number of symbols to the UE 202. The UE 202includes a processor 214 for determining the number of symbols to beused by the UE 202 to send the uplink control information 206. Thisdetermination may be based on the indication 212 (received by atransceiver 216) or based on an independent determination made by theprocessor 214 (e.g., based on link gain and/or payload size informationacquired by the UE 202). The UE 202 then uses the transceiver 216 tosend the uplink control information 206 to the transceiver 210 via thedetermined number of symbols. In some implementations, the UE 202 andthe base station 204 may include mmW functionality as in the UEs 104 and106 and the base station 102 of FIG. 1, respectively.

FIG. 3 illustrates a communication system 300 where a UE 302 sendschannel feedback 306 for a number of beams to a base station 304. Insome aspects, the number of beams may be based on the type of channelthat is used to send uplink control information. For example, channelfeedback may be sent for fewer beams if the uplink control informationis sent via a physical uplink control channel (PUCCH) as opposed to aphysical uplink shared channel (PUSCH). To this end, the base station304 includes a processor 308 for determining the number of beams forfeedback (e.g., the number of beams for which the UE 302 sends channelfeedback). In some implementations, the processor 308 may determinewhich channel the UE 302 is to use for sending uplink controlinformation and then use a transceiver 310 to send an indication 312 ofthe channel to be used. The UE 302 includes a processor 314 fordetermining the number of beams for feedback. This determination may bebased on the indication 312 (received by a transceiver 316) or based onan independent determination made by the processor 314 (e.g., based on aselection of the channel to be used for sending uplink controlinformation). The UE 302 then uses the transceiver 316 to send thechannel feedback 306 to the transceiver 310 for the determined number ofbeams. In some implementations, the UE 202 and the base station 204 mayinclude mmW functionality as in the UEs 104 and 106 and the base station102 of FIG. 1, respectively. In some implementations, the UE 302 and thebase station 304 may correspond to the UE 202 and the base station 204of FIG. 2, respectively.

Aspects of the disclosure are described in the following description andrelated drawings directed to specific examples. Alternate examples maybe devised without departing from the scope of the disclosure.Additionally, well-known elements will not be described in detail orwill be omitted so as not to obscure the relevant details of thedisclosure. The teachings herein can be implemented according to variousnetwork technologies including, without limitation, fifth generation(5G) technology, fourth generation (4G) technology, third generation(3G) technology, and other network architectures. Thus, various aspectsof the disclosure may be extended to networks based on 3rd GenerationPartnership Project (3GPP) Long Term Evolution (LTE), LTE-Advanced(LTE-A) (in FDD, TDD, or both modes), Universal MobileTelecommunications System (UMTS), Global System for MobileCommunications (GSM), Code Division Multiple Access (CDMA),Evolution-Data Optimized (EV-DO), Ultra Mobile Broadband (UMB), IEEE802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra-Wideband (UWB),Bluetooth, and/or other suitable systems. The actual telecommunicationstandard, network architecture, and/or communication standard employedwill depend on the specific application and the overall designconstraints imposed on the system. For purposes of illustration, thefollowing may describe various aspects in the context of a 5G systemand/or an LTE system. It should be appreciated, however, that theteachings herein may be employed in other systems as well. Thus,references to functionality in the context of 5G and/or LTE terminologyshould be understood to be equally applicable to other types oftechnology, networks, components, signaling, and so on.

Communicating SRS and Uplink Control Information

The disclosure relates in some aspects to communicating a soundingreference signal and uplink control information via different sets ofsymbols in a frame. For example, a user equipment may transmit asounding reference signal (SRS) in one set of symbols of a frame andtransmit physical uplink control channel (PUCCH) information in anotherset of symbols of the frame. The sounding reference signal and uplinkcontrol information may be communicated across the total bandwidth ofthe component carrier used to transmit the frame. Also, the soundingreference signal in a given frame may be associated with a single userequipment.

In some aspects, the disclosure relates to a sub-frame format with atleast two UL control symbols. One UL control symbol can be used tocollect a CQI, an ACK/NAK, a PMI, and an SR. Another UL control symbolcan be used to collect SRS from UEs.

FIG. 4 illustrates a communication system 400 where a UE 402 sendsuplink information 404 to a base station 406. As represented by a time(x axis) and frequency (y axis) resource block 408, an SRS 410 and ULcontrol information 412 may be sent via different sets of symbols. Forexample, data 414 may be sent via a first set of symbols, the SRS 410sent via a second set of symbols, and the UL control information 412sent via a third set of symbols. In some implementations, the UE 402 andthe base station 406 may include mmW functionality as in the UEs 104 and106 and the base station 102 of FIG. 1, respectively. In someimplementations, the UE 402 and the base station 406 may correspond tothe UE 202 and the base station 204 of FIG. 2 and/or the UE 302 and thebase station 304 of FIG. 3.

Example Self-Contained Sub-Frame Structures

FIGS. 5 and 6 illustrate examples of self-contained sub-framestructures. In some aspects, a self-contained sub-frame structure mayinclude at least one symbol for the DL direction and at least one symbolfor the UL direction. For example, a DL-centric sub-frame with symbolsfor DL data may include at least one symbol for transmission of ULcontrol information (e.g., ACK/NAK, etc.).

FIG. 5 illustrates an example of a self-contained DL sub-frame structure500. A BS sends control information (e.g., a physical downlink controlchannel, PDCCH 502) in the first symbol. The BS sends data in symbolindices 2-12 (e.g., a physical downlink shared channel, PDSCH 504). A UEsends an ACK/NAK 506 of received data (e.g., via physical uplink controlchannel, PUCCH 508) in the last symbol. The sub-frame structure 500 alsoincludes a switching gap 510 in the second to last symbol. The gap 510accommodates the switch from DL (the last PDSCH symbol) to UL (the PUCCHsymbol).

Some UEs (e.g., category 0 UEs) might not be able to generate an ACK/NAKwithin one symbol. These types of UEs could send the ACK/NAK in the nextsub-frame as shown in the sub-frame structures 600 of FIG. 6. Eachsub-frame structure in FIG. 6 includes a symbol for control information(e.g., PDCCH 602), symbols for data (e.g., PDSCH 604), a symbol forACK/NAK 606 of received data (e.g., PUCCH 508), and a symbol for aswitching gap 610. As indicated, each ACK/NAK is sent one sub-frameafter the data covered by the ACK/NAK.

Sub-Frame with SRS

As discussed above in conjunction with FIG. 4, in some implementations,an SRS may be sent in the same sub-frame as UL control information.There may be issues, however, with receiving the SRS along with the CQI,the ACK/NAK, the SR, and the PMI in one symbol. For example, a BS mayuse the SRS to estimate channel quality and enable frequency selectivescheduling on the UL. Although the UL receive (RX) beamforming used toreceive the CQI and the ACK/NAK does not need to be UE-specific, it isdesirable for the UL RX beamforming that is used to receive the soundingreference signal (SRS) to be UE-specific to provide a good channelestimate.

In general, it may be desirable to not use a UE-specific schedulingrequest (RS). Scheduling requests (SRs) can come from UEs located in anyangular region. Thus, a BS might not have the channel knowledge of thatparticular UE in advance.

Also, if a BS performs UE-specific UL RX beamforming to receive an SRS,the BS might not receive an SR from UEs that are located in a differentangular region. Accordingly, one UL control symbol might not besufficient in this scenario.

Sub-Frame Structure with Multiple UL Control Symbols

The disclosure relates in some aspects to a sub-frame format with atleast two UL control symbols. FIG. 7 illustrates an example of such asub-frame structure 700. The sub-frame structure 700 includes a symbolfor DL control information (e.g., PDCCH 702), symbols for data (e.g.,PDCCH 704), and a symbol for a switching gap 706.

A first UL control symbol (UL CTL) is used to collect CQI, ACK/NAK, PMIand SR 708. UL RX beamforming can be direction-specific or evenomni-directional. The UL control symbol may be available in mostsub-frames. The UL control symbol may be scheduled explicitly (e.g., bya BS) or implicitly (e.g., based on UE ID).

A second UL control symbol is used to collect SRS 710 from UEs. Asdiscussed above, it is desirable for UL RX beamforming to beUE-specific. The other UL control symbol may be available in somesub-frames (e.g., as per demand). A BS may explicitly schedule UEs totransmit SRS in this symbol or UEs may be scheduled implicitly (e.g.,based on UE ID). As discussed herein, the UL control information may becarried by a physical uplink control channel (PUCCH) or some othersuitable channel or channels.

UL and DL Sub-Frame Formats

FIG. 8 illustrates an example of different sub-frame formats with two ULcontrol symbols. The first sub-frame structure 800A is for a DL-centricsub-frame and the second sub-frame structure 800B is for an UL-centricsub-frame.

The first sub-frame structure 800A corresponds to the sub-framestructure 700 of FIG. 7. Thus, the sub-frame structure 800A includes asymbol for DL control information (e.g., PDCCH 802), symbols for DL data(e.g., PDSCH 804), a symbol for a switching gap 806, a first UL controlsymbol (UL CTL) for CQI, ACK/NAK, PMI and SR 808, and a second ULcontrol symbol for SRS 810.

The second sub-frame structure 800B can carry UL data. The sub-framestructure 800B includes a symbol for DL control information (e.g., PDCCH802), a symbol for a switching gap 806, symbols for UL data (e.g., PUSCH812), a first UL control symbol (UL CTL) for CQI, ACK/NAK, PMI and SR808, and a second UL control symbol for SRS 810. As discussed herein,the UL control information may be carried by a physical uplink controlchannel (PUCCH) or some other suitable channel or channels.

An UL centric sub-frame as used herein may be different from LTE asfollows. In LTE, UL control is transmitted in outer bands across allsymbols; while as used herein, UL control may be transmitted across alltones of the last set of symbols.

FIG. 9 illustrates another example of different sub-frame formats withtwo UL control symbols. The control information of each of thesesub-frames is conveyed in one or more previous sub-frames (not shown inFIG. 9).

The first sub-frame structure 900A includes symbols for DL data (e.g.,PDSCH 904), a symbol for a switching gap 906, a first UL control symbol(UL CTL) for CQI, ACK/NAK, PMI and SR 908, and a second UL controlsymbol for SRS 910. As discussed herein, the UL control information maybe carried by a physical uplink control channel (PUCCH) or some othersuitable channel or channels.

The second sub-frame structure 900B includes symbols for UL data (e.g.,PUSCH 912), a first UL control symbol (UL CTL) for CQI, ACK/NAK, PMI andSR 908, and a second UL control symbol for SRS 910. As discussed herein,the UL control information may be carried by a physical uplink controlchannel (PUCCH) or some other suitable channel or channels.

Variable Number of Symbols

FIG. 10 illustrates an example of sub-frame formats that show that adifferent number of symbols may be used for uplink control informationin different sub-frames. Different scenarios could use a differentnumber of symbols for uplink control information (e.g., two, three, ormore symbols).

The first sub-frame structure 1000A uses two symbols for the uplinkcontrol information. Specifically, the first sub-frame structure 1000Aincludes a symbol for DL control information (e.g., PDCCH 1002), symbolsfor DL data (e.g., PDSCH 1004), a symbol for a switching gap 1006, and atwo UL control symbols (UL CTL) for CQI, ACK/NAK, PMI and SR 1008 (andother UL control information, if applicable). As discussed herein, theUL CTL may be a physical uplink control channel (PUCCH) or some othersuitable channel or channels.

The second sub-frame structure 1000B uses one symbol for the uplinkcontrol information. Specifically, the second sub-frame structure 1000Bincludes a symbol for DL control information (e.g., PDCCH 1002), symbolsfor DL data (e.g., PDSCH 1004), a symbol for a switching gap 1006, andan UL control symbol (UL CTL) for CQI, ACK/NAK, PMI and SR 1008 (andother UL control information, if applicable). As discussed herein, theUL CTL may be a physical uplink control channel (PUCCH) or some othersuitable channel or channels.

In some aspects, the number of uplink control symbols may be based onchannel information for a UE. In some aspects, the channel informationmay depend on at least one of: at least one parameter of a path lossassociated with a user equipment, an angle of departure of a signal fromthe user equipment, or an angle of arrival of a signal at a basestation.

For example, a larger number of control symbols may be needed if a UEhas relatively poor link gain (e.g., one symbol might not be sufficientto reliably send the control information). In contrast, a smaller numberof control symbols may be sufficient if a UE has relatively good linkgain.

Other examples of channel information that may be used to determine thenumber of control symbols to be used include at least one of: a receivedsignal strength indicator, reference signal received power, referencesignal received quality, narrowband channel quality information, orreference signal received power of beams of neighboring cells.

In some aspects, the number of uplink control symbols may be based oncontrol information associated with a UE. Examples of controlinformation that may be used to determine the number of control symbolsto be used include at least one of: how much feedback information needsto be sent, precoding matrix information, a scheduling request,narrowband channel quality information, beam information (e.g., fornarrowband beams), or acknowledgement information (e.g., ACK or NAK).

Different Uplink Channels

Uplink control information may be sent via different uplink channels. Asdiscussed above in conjunction with FIGS. 5-10, uplink controlinformation may be sent via a physical uplink control channel (PUCCH) insome implementations. FIG. 11 illustrates an alternative example whereuplink control information is sent via a physical uplink shared channel(PUSCH). Other examples may use other types of uplink channels or otherframe formats.

The sub-frame structure 1100 of FIG. 11 includes a symbol for DL controlinformation (e.g., PDCCH 1102), a symbol for a switching gap 1104,symbols for UL data (e.g., PUSCH carrying traffic 1106), and symbols forUL control information (e.g., PUSCH carrying UL CTL 1108).

In some implementations, a base station instructs a UE as to whichchannel is to be used. For example, a base station may inform a userequipment via a physical downlink control channel if the user equipmentis to transmit the uplink control information via the PUCCH or thePUSCH. As another example, separate bits are reserved in downlinkcontrol information (DCI) formats to indicate whether the user equipmentis to transmit the uplink control information via the PUCCH or thePUSCH.

Other Aspects

In view of the above, in some aspects, an apparatus (e.g., a BS) maygenerate a frame structure with multiple UL control symbols where UEsmay transmit SRS in one set of symbols and CQI, ACK/NAK, PMI and SR inthe other set of control symbols. In some aspects, the BS may explicitlyschedule UEs to transmit SRS in one set of symbols. In some aspects, theBS may explicitly schedule UEs to transmit CQI, ACK/NAK, PMI and SR inthe other set of symbols. In some aspects, UEs may use their IDs todetermine the tone locations and the symbol locations where the UEs willtransmit at least one of SRS, CQI, ACK/NAK, PMI, SR, or any combinationthereof.

Further in view of the above, in some aspects, an apparatus (e.g., a UE)may communicate an SRS during a first set of symbols in a frame andcommunicate UL control information during a second set of symbols in theframe. In some aspects, a BS may determine (e.g., select) a group ofusers (e.g., UEs) that transmit SRS and/or UL control informationsimultaneously in the frame based on an angle of arrival of the signalsfrom the users at the BS.

Beam Sweep at the Base Station

Path loss may be very high in MMW systems. Accordingly, MMW systems mayuse directional transmission to mitigate path loss. A base station maytransmit a beam reference signal (BRS) by sweeping in all directions sothat a UE can determine the best “coarse” beam identifier (ID). The UEfeeds back the ID of the best “coarse” beam to the base station.Thereafter, the base station can transmit a channel state informationreference signal (CSI-RS) so that a UE can track “fine” (e.g., refined)beams. The UE then feeds-back the channel information of BRS and CSI-RSto the base station (e.g., as uplink control information as discussedherein). The base station may send beam reference signals during asynchronization sub-frame. The base station may send CSI-RS signalsduring some symbols of a physical downlink shared channel (PDSCH) or aphysical uplink shared channel (PUSCH).

FIG. 12 illustrates two example beam sweeps for BRS where each sweepinvolves four beams (e.g., concurrent beams) Other examples may use adifferent number of beams per sweep. Also, beams transmitted during thesame symbol might not be adjacent with each other.

During a first sweep 1202, a base station sweeps four directions usingfour antenna ports in a cell-specific manner in the first symbol of thesynchronization sub-frame. These directions are “coarse” beamdirections.

During a second sweep 1204, the base station sweeps four differentdirections in a cell-specific manner using four antenna ports in thesecond symbol of the synchronization sub-frame. These directions arealso “coarse” beam directions.

Synchronization Sub-Frame

FIG. 13 depicts an example of a synchronization sub-frame 1300. Asynchronization sub-frame may take a different form in other examples.

In one example, 1, 2, 4, or 8 antenna ports may be active. The beam ofeach antenna port may change from symbol to symbol. Primarysynchronization signal (PSS), extended synchronization signal (ESS),secondary synchronization signal (SSS), and physical broadcast channel(PBCH) may be transmitted by all antenna ports on the same subcarriers.

In some implementations, BRS may be transmitted by all antenna ports.Here, BRS may be transmitted on disjoint subcarriers in some cases.Alternatively, BRS may be code division multiplexed.

Beam Refinement

FIGS. 14 and 15 depict examples of a beam refinement. Beam refinementmay take a different form in other examples.

Referring initially to FIG. 14, the beams 1402 and 1404 represent coarsebeams that may be transmitted, for example, during a BRS session. Thebeams 1406 and 1408 represent fine beams that may be transmitted, forexample, during a CSI-RS session.

FIG. 15 shows a more detailed example of a beam refinement duringCSI-RS. A base station may transmit finer beams through different portsin the last two symbols of the sub-frame containing the CSI-RS.Different reference signals may be transmitted in different directionsvia different antenna ports.

As shown in the first beam representation 1502, the total beam setcontains eight different beams. As shown in the second beamrepresentation 1504, a base station may transmit BRS in odd indexeddirections continuously during the synchronization sub-frame. As shownin the third beam representation 1506, a UE finds beam index 5 to be thestrongest “coarse” beam. The UE then informs the base station of thebest “coarse” beam ID among the beams transmitted during the BRS session(i.e., from beams IDs 1, 3, 5, and 7 in this example). As shown in thefourth beam representation 1508, the UE requests the base station totransmit a UE-specific CSI-RS. In response, the base station transmits afine beam in directions 4, 5 and 6 to the UE in CSI-RS. The UE thensends the ID of the best fine “beam” to the base station (e.g., using 2bits). In response, the base station transmits data using this “fine”beam ID.

Channel Feedback Information

As discussed herein, a UE feeds-back the channel information ofdifferent beams to the base station. The base station then schedules thebest beam for traffic based on UE's feedback. The number of beams whosechannel information are fed-back to the base station can depend on thelink gain of the UE. UEs whose link gain is poor might only be able tofeed-back one beam's channel information. UEs whose link gain is goodmight feed-back multiple beams' channel information. Feedback can gothrough either PUCCH or PUSCH as discussed above.

First Example Apparatus

FIG. 16 illustrates a block diagram of an example hardwareimplementation of an apparatus 1600 configured to communicate accordingto one or more aspects of the disclosure. The apparatus 1600 couldembody or be implemented within a UE, a BS, or some other type of devicethat supports wireless communication. In various implementations, theapparatus 1600 could embody or be implemented within an access terminal,an access point, or some other type of device. In variousimplementations, the apparatus 1600 could embody or be implementedwithin a mobile phone, a smart phone, a tablet, a portable computer, aserver, a personal computer, a sensor, an entertainment device, amedical device, or any other electronic device having circuitry.

The apparatus 1600 includes a communication interface (e.g., at leastone transceiver) 1602, a storage medium 1604, a user interface 1606, amemory device (e.g., a memory circuit) 1608, and a processing circuit1610 (e.g., at least one processor). In various implementations, theuser interface 1606 may include one or more of: a keypad, a display, aspeaker, a microphone, a touchscreen display, of some other circuitryfor receiving an input from or sending an output to a user.

These components can be coupled to and/or placed in electricalcommunication with one another via a signaling bus or other suitablecomponent, represented generally by the connection lines in FIG. 16. Thesignaling bus may include any number of interconnecting buses andbridges depending on the specific application of the processing circuit1610 and the overall design constraints. The signaling bus linkstogether various circuits such that each of the communication interface1602, the storage medium 1604, the user interface 1606, and the memorydevice 1608 are coupled to and/or in electrical communication with theprocessing circuit 1610. The signaling bus may also link various othercircuits (not shown) such as timing sources, peripherals, voltageregulators, and power management circuits, which are well known in theart, and therefore, will not be described any further.

The communication interface 1602 provides a means for communicating withother apparatuses over a transmission medium. In some implementations,the communication interface 1602 includes circuitry and/or programmingadapted to facilitate the communication of information bi-directionallywith respect to one or more communication devices in a network. In someimplementations, the communication interface 1602 is adapted tofacilitate wireless communication of the apparatus 1600. In theseimplementations, the communication interface 1602 may be coupled to oneor more antennas 1612 as shown in FIG. 16 for wireless communicationwithin a wireless communication system. The communication interface 1602can be configured with one or more standalone receivers and/ortransmitters, as well as one or more transceivers. In the illustratedexample, the communication interface 1602 includes a transmitter 1614and a receiver 1616. The communication interface 1602 serves as oneexample of a means for receiving and/or means transmitting.

The memory device 1608 may represent one or more memory devices. Asindicated, the memory device 1608 may maintain uplink controlinformation 1618 along with other information used by the apparatus1600. In some implementations, the memory device 1608 and the storagemedium 1604 are implemented as a common memory component. The memorydevice 1608 may also be used for storing data that is manipulated by theprocessing circuit 1610 or some other component of the apparatus 1600.

The storage medium 1604 may represent one or more computer-readable,machine-readable, and/or processor-readable devices for storingprogramming, such as processor executable code or instructions (e.g.,software, firmware), electronic data, databases, or other digitalinformation. The storage medium 1604 may also be used for storing datathat is manipulated by the processing circuit 1610 when executingprogramming. The storage medium 1604 may be any available media that canbe accessed by a general purpose or special purpose processor, includingportable or fixed storage devices, optical storage devices, and variousother mediums capable of storing, containing or carrying programming.

By way of example and not limitation, the storage medium 1604 mayinclude a magnetic storage device (e.g., hard disk, floppy disk,magnetic strip), an optical disk (e.g., a compact disc (CD) or a digitalversatile disc (DVD)), a smart card, a flash memory device (e.g., acard, a stick, or a key drive), a random access memory (RAM), a readonly memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM),an electrically erasable PROM (EEPROM), a register, a removable disk,and any other suitable medium for storing software and/or instructionsthat may be accessed and read by a computer. The storage medium 1604 maybe embodied in an article of manufacture (e.g., a computer programproduct). By way of example, a computer program product may include acomputer-readable medium in packaging materials. In view of the above,in some implementations, the storage medium 1604 may be a non-transitory(e.g., tangible) storage medium.

The storage medium 1604 may be coupled to the processing circuit 1610such that the processing circuit 1610 can read information from, andwrite information to, the storage medium 1604. That is, the storagemedium 1604 can be coupled to the processing circuit 1610 so that thestorage medium 1604 is at least accessible by the processing circuit1610, including examples where at least one storage medium is integralto the processing circuit 1610 and/or examples where at least onestorage medium is separate from the processing circuit 1610 (e.g.,resident in the apparatus 1600, external to the apparatus 1600,distributed across multiple entities, etc.).

Programming stored by the storage medium 1604, when executed by theprocessing circuit 1610, causes the processing circuit 1610 to performone or more of the various functions and/or process operations describedherein. For example, the storage medium 1604 may include operationsconfigured for regulating operations at one or more hardware blocks ofthe processing circuit 1610, as well as to utilize the communicationinterface 1602 for wireless communication utilizing their respectivecommunication protocols.

The processing circuit 1610 is generally adapted for processing,including the execution of such programming stored on the storage medium1604. As used herein, the terms “code” or “programming” shall beconstrued broadly to include without limitation instructions,instruction sets, data, code, code segments, program code, programs,programming, subprograms, software modules, applications, softwareapplications, software packages, routines, subroutines, objects,executables, threads of execution, procedures, functions, etc., whetherreferred to as software, firmware, middleware, microcode, hardwaredescription language, or otherwise.

The processing circuit 1610 is arranged to obtain, process and/or senddata, control data access and storage, issue commands, and control otherdesired operations. The processing circuit 1610 may include circuitryconfigured to implement desired programming provided by appropriatemedia in at least one example. For example, the processing circuit 1610may be implemented as one or more processors, one or more controllers,and/or other structure configured to execute executable programmingExamples of the processing circuit 1610 may include a general purposeprocessor, a digital signal processor (DSP), an application-specificintegrated circuit (ASIC), a field programmable gate array (FPGA) orother programmable logic component, discrete gate or transistor logic,discrete hardware components, or any combination thereof designed toperform the functions described herein. A general purpose processor mayinclude a microprocessor, as well as any conventional processor,controller, microcontroller, or state machine. The processing circuit1610 may also be implemented as a combination of computing components,such as a combination of a DSP and a microprocessor, a number ofmicroprocessors, one or more microprocessors in conjunction with a DSPcore, an ASIC and a microprocessor, or any other number of varyingconfigurations. These examples of the processing circuit 1610 are forillustration and other suitable configurations within the scope of thedisclosure are also contemplated.

According to one or more aspects of the disclosure, the processingcircuit 1610 may be adapted to perform any or all of the features,processes, functions, operations and/or routines for any or all of theapparatuses described herein. For example, the processing circuit 1610may be configured to perform any of the steps, functions, and/orprocesses described with respect to FIGS. 17-28. As used herein, theterm “adapted” in relation to the processing circuit 1610 may refer tothe processing circuit 1610 being one or more of configured, employed,implemented, and/or programmed to perform a particular process,function, operation and/or routine according to various featuresdescribed herein.

The processing circuit 1610 may be a specialized processor, such as anapplication-specific integrated circuit (ASIC) that serves as a meansfor (e.g., structure for) carrying out any one of the operationsdescribed in conjunction with FIGS. 17-28. The processing circuit 1610serves as one example of a means for transmitting and/or a means forreceiving. In various implementations, the processing circuit 1610 mayincorporate the functionality of the UE 202 (e.g., the processor 214) orthe base station 204 (e.g., the processor 208) of FIG. 2, the UE 302(e.g., the processor 314) or the base station 304 (e.g., the processor308) of FIG. 3, or the UE 402 or the base station 406 of FIG. 4.

According to at least one example of the apparatus 1600, the processingcircuit 1610 may include one or more of a circuit/module for determininga quantity of symbols based on link gain 1620, a circuit/module forcommunicating 1622, a circuit/module for determining symbol locations1624, a circuit/module for determining tone locations 1626, or acircuit/module for determining a quantity of symbols based on payloadsize 1628. In various implementations, the circuit/module fordetermining a quantity of symbols based on link gain 1620, thecircuit/module for communicating 1622, the circuit/module fordetermining symbol locations 1624, the circuit/module for determiningtone locations 1626, or the circuit/module for determining a quantity ofsymbols based on payload size 1628 may correspond, at least in part, tothe functionality of the UE 202 (e.g., the processor 214) or the basestation 204 (e.g., the processor 208) of FIG. 2, the UE 302 (e.g., theprocessor 314) or the base station 304 (e.g., the processor 308) of FIG.3, or the UE 402 or the base station 406 of FIG. 4.

As mentioned above, programming stored by the storage medium 1604, whenexecuted by the processing circuit 1610, causes the processing circuit1610 to perform one or more of the various functions and/or processoperations described herein. For example, the programming, when executedby the processing circuit 1610, may cause the processing circuit 1610 toperform the various functions, steps, and/or processes described hereinwith respect to FIGS. 17-28 in various implementations. As shown in FIG.16, the storage medium 1604 may include one or more of code fordetermining a quantity of symbols based on link gain 1630, code forcommunicating 1632, code for determining symbol locations 1634, code fordetermining tone locations 1636, or code for determining a quantity ofsymbols based on payload size 1638. In various implementations, the codefor determining a quantity of symbols based on link gain 1630, the codefor communicating 1632, the code for determining symbol locations 1634,the code for determining tone locations 1636, or the code fordetermining a quantity of symbols based on payload size 1638 may beexecuted or otherwise used to provide the functionality described hereinfor the circuit/module for determining a quantity of symbols based onlink gain 1620, the circuit/module for communicating 1622, thecircuit/module for determining symbol locations 1624, the circuit/modulefor determining tone locations 1626, or the circuit/module fordetermining a quantity of symbols based on payload size 1628.

The circuit/module for determining a quantity of symbols based on linkgain 1620 may include circuitry and/or programming (e.g., code fordetermining a quantity of symbols based on link gain 1630 stored on thestorage medium 1604) adapted to perform several functions relating to,for example, determining a quantity of symbols for communication ofinformation (e.g., within a frame). In some aspects, the determinedquantity of symbols may be used to communicate uplink controlinformation. In some aspects, the determined quantity of symbols may beused to communicate a sounding reference signal.

In some implementations, the circuit/module for determining a quantityof symbols based on link gain 1620 obtains an indication of link gainassociated with a particular UE (e.g., from the circuit/module forcommunicating 1622, the memory device 1608, the communication interface1602, the receiver 1616, or some other component). The circuit/modulefor determining a quantity of symbols based on link gain 1620 thencompares the link gain to one or more thresholds (or uses again-to-number table or some other suitable mapping) to determine thenumber of symbols that should be used for this particular link gain. Thecircuit/module for determining a quantity of symbols based on link gain1620 then outputs an indication of the determined quantity of symbols(e.g., to the circuit/module for communicating 1622, the memory device1608, the communication interface 1602, the transmitter 1614, or someother component).

In some implementations, the circuit/module for determining a quantityof symbols based on link gain 1620 directly obtains an indication of thequantity of symbols (e.g., from the circuit/module for communicating1622, the memory device 1608, the communication interface 1602, thereceiver 1616, or some other component). For example, the circuit/modulefor determining a quantity of symbols based on link gain 1620 mayidentify a memory location in the memory device 1608 that stores thequantity information and invokes a read of that location to obtain theinformation. The circuit/module for determining a quantity of symbolsbased on link gain 1620 then outputs the information (e.g., sends theinformation to the circuit/module for communicating 1622, sends theinformation to a process, or sends the information to another componentof the apparatus 1600).

The circuit/module for communicating 1622 may include circuitry and/orprogramming (e.g., code for communicating 1632 stored on the storagemedium 1604) adapted to perform several functions relating to, forexample, communicating information. In some implementations, thecommunication involves receiving the information. In someimplementations, the communication involves sending (e.g., transmitting)the information.

The information may take different forms in different scenarios. In someaspects, the circuit/module for communicating 1622 may communicateuplink control information (e.g., at particular symbol locations duringa frame and/or at particular tone locations during a frame). In someaspects, the circuit/module for communicating 1622 may communicatescheduling information. In some aspects, the circuit/module forcommunicating 1622 may communicate a sounding reference signal.

In some implementation, the circuit/module for communicating 1622 mayuse one or more parameters for the communicating. For example, thecircuit/module for communicating 1622 may obtain information abouttiming (e.g., symbol locations) and/or tone locations and communicateinformation at those locations.

In some implementations where the communicating involves receivinginformation, the circuit/module for communicating 1622 receivesinformation (e.g., from the communication interface 1602, the receiver1616, the memory device 1608, some other component of the apparatus1600, or some other device), processes (e.g., decodes) the information,and outputs the information to another component of the apparatus 1600(e.g., the memory device 1608 or some other component). In somescenarios (e.g., if the circuit/module for communicating 1622 includes areceiver), the communicating involves the circuit/module forcommunicating 1622 receiving information directly from a device thattransmitted the information (e.g., via radio frequency signaling or someother type of signaling suitable for the applicable communicationmedium).

In some implementations where the communicating involves sendinginformation, the circuit/module for communicating 1622 obtainsinformation (e.g., from the memory device 1608 or some other componentof the apparatus 1600), processes (e.g., encodes) the information, andoutputs the processed information. In some scenarios, the communicatinginvolves sending the information to another component of the apparatus1600 (e.g., the transmitter 1614, the communication interface 1602, orsome other component) that will transmit the information to anotherdevice. In some scenarios (e.g., if the circuit/module for communicating1622 includes a transmitter), the communicating involves thecircuit/module for communicating 1622 transmitting the informationdirectly to another device (e.g., the ultimate destination) via radiofrequency signaling or some other type of signaling suitable for theapplicable communication medium.

In some implementations, the circuit/module for communicating 1622 is atransceiver. In some implementations, the circuit/module forcommunicating 1622 is a receiver. In some implementations, thecircuit/module for communicating 1622 is a transmitter. In someimplementations, the communication interface 1602 includes thecircuit/module for communicating 1622 and/or the code for communicating1632. In some implementations, the circuit/module for communicating 1622and/or the code for communicating 1632 is configured to control thecommunication interface 1602 (e.g., a transceiver, a receiver, or atransmitter) to communicate the information.

The circuit/module for determining symbol locations 1624 may includecircuitry and/or programming (e.g., code for determining symbollocations 1634 stored on the storage medium 1604) adapted to performseveral functions relating to, for example, determining symbol locationsfor communication of information within a frame. In some aspects, thedetermined symbol locations may be used to communicate uplink controlinformation.

In some implementations, the circuit/module for determining symbollocations 1624 performs the operations that follow if the determinationof the symbol locations is based on an identifier of a user equipment.In this case, the circuit/module for determining symbol locations 1624obtains the identifier (e.g., from the circuit/module for communicating1622, the memory device 1608, the communication interface 1602, thereceiver 1616, or some other component). The circuit/module fordetermining symbol locations 1624 then uses an identifier-to-symbollocation mapping (e.g., in the form of a table, an algorithm, or someother suitable mapping) to identify the symbol location or locationsassociated with that identifier. The circuit/module for determiningsymbol locations 1624 then outputs an indication of the determinedsymbol locations (e.g., to the circuit/module for communicating 1622,the memory device 1608, the communication interface 1602, thetransmitter 1614, or some other component).

The circuit/module for determining tone locations 1626 may includecircuitry and/or programming (e.g., code for determining tone locations1636 stored on the storage medium 1604) adapted to perform severalfunctions relating to, for example, determining tone locations forcommunication of information within a frame. In some aspects, thedetermined tone locations may be used to communicate uplink controlinformation.

In some implementations, the circuit/module for determining tonelocations 1626 performs the operations that follow if the determinationof the tone locations is based on an identifier of a user equipment. Inthis case, the circuit/module for determining tone locations 1626obtains the identifier (e.g., from the circuit/module for communicating1622, the memory device 1608, the communication interface 1602, thereceiver 1616, or some other component). The circuit/module fordetermining tone locations 1626 then uses an identifier-to-tone locationmapping (e.g., in the form of a table, an algorithm, or some othersuitable mapping) to identify the tone location or locations associatedwith that identifier. The circuit/module for determining tone locations1626 then outputs an indication of the determined tone locations (e.g.,to the circuit/module for communicating 1622, the memory device 1608,the communication interface 1602, the transmitter 1614, or some othercomponent).

The circuit/module for determining a quantity of symbols based on linkgain 1620 may include circuitry and/or programming (e.g., code fordetermining a quantity of symbols based on link gain 1630 stored on thestorage medium 1604) adapted to perform several functions relating to,for example, determining a quantity of symbols for communication ofinformation (e.g., within a frame). In some aspects, the determinedsymbol locations may be used to communicate uplink control information.In some aspects, the determined symbol locations may be used tocommunicate a sounding reference signal.

The circuit/module for determining a quantity of symbols based onpayload size 1628 may include circuitry and/or programming (e.g., codefor determining a quantity of symbols based on payload size 1638 storedon the storage medium 1604) adapted to perform several functionsrelating to, for example, determining a quantity of symbols forcommunication of information (e.g., within a frame). In some aspects,the determined quantity of symbols may be used to communicate uplinkcontrol information. In some aspects, the determined quantity of symbolsmay be used to communicate a sounding reference signal.

In some implementations, the circuit/module for determining a quantityof symbols based on payload size 1628 obtains an indication of payloadsize associated with a particular UE (e.g., from the circuit/module forcommunicating 1622, the memory device 1608, the communication interface1602, the receiver 1616, or some other component). The circuit/modulefor determining a quantity of symbols based on payload size 1628 thencompares the payload size to one or more thresholds (or uses a payloadsize-to-number table or some other suitable mapping) to determine thenumber of symbols that should be used for this particular payload size.The circuit/module for determining a quantity of symbols based onpayload size 1628 then outputs an indication of the determined quantityof symbols (e.g., to the circuit/module for communicating 1622, thememory device 1608, the communication interface 1602, the transmitter1614, or some other component).

In some implementations, the circuit/module for determining a quantityof symbols based on payload size 1628 directly obtains an indication ofthe quantity of symbols (e.g., from the circuit/module for communicating1622, the memory device 1608, the communication interface 1602, thereceiver 1616, or some other component). For example, the circuit/modulefor determining a quantity of symbols based on payload size 1628 mayidentify a memory location in the memory device 1608 that stores thequantity information and invokes a read of that location to obtain theinformation. The circuit/module for determining a quantity of symbolsbased on payload size 1628 then outputs the information (e.g., sends theinformation to the circuit/module for communicating 1622, sends theinformation to a process, or sends the information to another componentof the apparatus 1600).

First Example Process

FIG. 17 illustrates a process 1700 for communication in accordance withsome aspects of the disclosure. The process 1700 may take place within aprocessing circuit (e.g., the processing circuit 1610 of FIG. 16), whichmay be located in a UE, a BS, or some other suitable apparatus. Ofcourse, in various aspects within the scope of the disclosure, theprocess 1700 may be implemented by any suitable apparatus capable ofsupporting communication-related operations.

At block 1702, an apparatus (e.g., a UE or BS) determines a quantity ofsymbols to communicate uplink control information. In some aspects, thedetermination may be based on a link gain of a user equipment (UE). Forexample, a larger number of symbols may be used if the link gain islower. In some aspects, the link gain may depend on a path lossassociated with the UE and/or an angle of arrival of a signal from theUE to a base station.

The uplink control information may take various forms. In some aspects,the uplink control information may include at least one of: channelquality information, precoding matrix information, a scheduling request,acknowledgement information, or any combination thereof.

In some aspects, the uplink control information may include channelinformation for different beams. In some aspects, the channelinformation may include at least one of: a received signal strengthindicator, reference signal received power, reference signal receivedquality, narrowband channel quality information, or any combinationthereof. In some aspects, the different beams may be for neighboringcells. In some aspects, the channel information may include referencesignal received power of the different beams. In some aspects, aquantity of the different beams may be determined based on the link gainof the UE. In some aspects, the different beams may be used tocommunicate at least one of: a beam reference signal, a channel stateinformation reference signal, or any combination thereof. In someaspects, the beam reference signal may be communicated during asynchronization sub-frame.

In some aspects, the determination of the quantity of symbols mayinclude determining the link gain and selecting the quantity of symbolsbased on the determined link gain. In some aspects, the determination ofthe quantity of symbols may include receiving an indication of thequantity of symbols.

In some implementations, the circuit/module for determining a quantityof symbols based on link gain 1620 of FIG. 16 performs the operations ofblock 1702. In some implementations, the code for determining a quantityof symbols based on link gain 1630 of FIG. 16 is executed to perform theoperations of block 1702.

At block 1704, the apparatus (e.g., a UE or BS) communicates (e.g.,sends or receives) the uplink control information using the determinedquantity of symbols. For example, a UE may transmit the uplink controlinformation. As another example, a BS may receive the uplink controlinformation. In some aspects, the communication may be beamformedcommunication.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 1704. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 1704.

Second Example Process

FIG. 18 illustrates a process 1800 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 1800 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17. The process 1800 may take place within aprocessing circuit (e.g., the processing circuit 1610 of FIG. 16), whichmay be located in a UE, a BS, or some other suitable apparatus. Ofcourse, in various aspects within the scope of the disclosure, theprocess 1800 may be implemented by any suitable apparatus capable ofsupporting communication-related operations.

At block 1802, an apparatus (e.g., a UE or BS) determines a quantity ofsymbols to communicate uplink control information. In some aspects, thedetermination may be based on a payload size of the uplink controlinformation. For example, a larger number of symbols may be used if thepayload size is higher. This stands in contrast, for example, toconventional systems (e.g., LTE) where the same number of symbols isused irrespective of the payload size (e.g., where the coding is changedto accommodate different payload sizes). The uplink control informationmay take various forms (e.g., as discussed above in conjunction withblock 1702).

In some aspects, the determination of the quantity of symbols mayinclude determining the payload size and selecting the quantity ofsymbols based on the determined payload size. In some aspects, thedetermination of the quantity of symbols may include receiving anindication of the quantity of symbols.

In some implementations, the circuit/module for determining a quantityof symbols based on payload size 1628 of FIG. 16 performs the operationsof block 1802. In some implementations, the code for determining aquantity of symbols based on payload size 1638 of FIG. 16 is executed toperform the operations of block 1802.

At block 1804, the apparatus (e.g., a UE or BS) communicates (e.g.,sends or receives) the uplink control information using the determinedquantity of symbols. For example, a UE may transmit the uplink controlinformation. As another example, a BS may receive the uplink controlinformation. In some aspects, the communication may be beamformedcommunication.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 1804. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 1804.

Third Example Process

FIG. 19 illustrates a process 1900 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 1900 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process1900 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a UE, a BS, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 1900 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 1902, an apparatus (e.g., a UE or BS) determines a quantity ofsymbols to communicate a sounding reference signal. In some aspects, thedetermination may be based on a link gain of a user equipment (UE)and/or a payload size of the uplink control information. In someaspects, the link gain depends on a path loss associated with the UE andan angle of arrival of a signal from the UE to a base station.

In some implementations, the circuit/module for determining a quantityof symbols based on link gain 1620 of FIG. 16 performs the operations ofblock 1902. In some implementations, the code for determining a quantityof symbols based on link gain 1630 of FIG. 16 is executed to perform theoperations of block 1902.

At block 1904, the apparatus (e.g., a UE or BS) communicates (e.g.,sends or receives) the sounding reference signal using the determinedquantity of symbols. For example, a UE may transmit the soundingreference signal. As another example, a BS may receive the soundingreference signal. In some aspects, the communication may be beamformedcommunication.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 1904. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 1904.

Fourth Example Process

FIG. 20 illustrates a process 2000 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 2000 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process2000 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a UE, a BS, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 2000 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 2002, an apparatus (e.g., a UE) communicates schedulinginformation. For example, a UE may receive the scheduling informationfrom a BS. In some aspects, the scheduling information may indicate thatthe user equipment is to transmit the sounding reference signal during aparticular set of symbols in a frame (e.g., the first set of symbols inthe frame).

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2002. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2002.

At block 2004, the apparatus communicates the sounding reference signalaccording to the scheduling information received at block 2002 (e.g.,during the first set of symbols in the frame).

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2004. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2004.

Fifth Example Process

FIG. 21 illustrates a process 2100 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 2100 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process2100 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a UE, a BS, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 2100 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 2102, an apparatus (e.g., a UE) communicates schedulinginformation. For example, a UE may receive the scheduling informationfrom a BS. In some aspects, the scheduling information may indicate thata user equipment is to transmit the uplink control information during aparticular set of symbols in a frame (e.g., the second set of symbols inthe frame).

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2102. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2102.

At optional block 2104, the apparatus communicates the uplink controlinformation according to the scheduling information received at block2102 (e.g., during the second set of symbols in the frame).

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2104. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2104.

Sixth Example Process

FIG. 22 illustrates a process 2200 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 2200 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process2200 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a UE, a BS, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 2200 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 2202, an apparatus (e.g., a UE) determines symbol locations inthe frame based on an identifier of the user equipment. For example,certain UE identifiers may be mapped to particular symbol locations.

In some implementations, the circuit/module for determining symbollocations 1624 of FIG. 16 performs the operations of block 2202. In someimplementations, the code for determining symbol locations 1634 of FIG.16 is executed to perform the operations of block 2202.

At block 2204, the apparatus communicates the uplink control informationand/or the sounding reference signal at the determined symbol locations.For example, a UE may transmit the uplink control information and/or thesounding reference signal at the symbol locations determined at block2202.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2204. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2204.

Seventh Example Process

FIG. 23 illustrates a process 2300 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 2300 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process2300 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a UE, a BS, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 2300 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 2302, an apparatus (e.g., a UE) determines tone locations inthe frame based on an identifier of the user equipment. For example,certain UE identifiers may be mapped to particular tone locations.

In some implementations, the circuit/module for determining tonelocations 1626 of FIG. 16 performs the operations of block 2302. In someimplementations, the code for determining tone locations 1636 of FIG. 16is executed to perform the operations of block 2302.

At block 2304, the apparatus communicates the uplink control informationand/or the sounding reference signal at the determined tone locations.For example, a UE may transmit the uplink control information and/or thesounding reference signal at the symbol locations determined at block2302.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2304. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2304.

Eighth Example Process

FIG. 24 illustrates a process 2400 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 2400 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process2400 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a BS, a UE, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 2400 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 2402, an apparatus (e.g., a BS) schedules a user equipment totransmit the sounding reference signal during the first set of symbolsin a frame.

In some implementations, the circuit/module for determining symbollocations 1624 of FIG. 16 performs the operations of block 2402. In someimplementations, the code for determining symbol locations 1634 of FIG.16 is executed to perform the operations of block 2402.

At block 2404, the apparatus communicates scheduling information thatindicates that a UE is to transmit the sounding reference signal duringa particular set of symbols in a frame. For example, a BS may transmitan indication of the scheduling of block 2402.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2404. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2404.

At block 2406, the apparatus communicates the sounding reference signalduring indicated set of symbols in a frame. For example, a BS mayreceive the sounding reference signal during the first set of symbols.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2406. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2406.

Ninth Example Process

FIG. 25 illustrates a process 2500 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 2500 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process2500 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a BS, a UE, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 2500 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 2502, an apparatus (e.g., a BS) schedules a user equipment totransmit the uplink control information during the second set of symbolsin the frame.

In some implementations, the circuit/module for determining symbollocations 1624 of FIG. 16 performs the operations of block 2502. In someimplementations, the code for determining symbol locations 1634 of FIG.16 is executed to perform the operations of block 2502.

At block 2504, the apparatus communicates scheduling information thatindicates that a UE is to transmit the uplink control information duringa particular set of symbols in a frame. For example, a BS may transmitan indication of the scheduling of block 2502.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2504. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2504.

At block 2506, the apparatus communicates the uplink control informationduring indicated set of symbols in a frame. For example, a BS mayreceive the uplink control information during the second set of symbols.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2506. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2506.

Tenth Example Process

FIG. 26 illustrates a process 2600 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 2600 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process2600 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a BS, a UE, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 2600 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 2602, an apparatus (e.g., a BS) selects symbol locations in theframe based on an identifier of a user equipment.

In some implementations, the circuit/module for determining symbollocations 1624 of FIG. 16 performs the operations of block 26402. Insome implementations, the code for determining symbol locations 1634 ofFIG. 16 is executed to perform the operations of block 2602.

At block 2604, the apparatus transmits the identifier to the userequipment using radio resource control (RRC) signaling.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2604. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2604.

At block 2606, the apparatus receives uplink control information and/ora sounding reference signal at the selected symbol locations.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2606. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2606.

Eleventh Example Process

FIG. 27 illustrates a process 2700 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 2700 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process2700 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a BS, a UE, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 2700 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 2702, an apparatus (e.g., a BS) determines tone locations inthe frame based on an identifier of a user equipment.

In some implementations, the circuit/module for determining tonelocations 1626 of FIG. 16 performs the operations of block 2702. In someimplementations, the code for determining tone locations 1636 of FIG. 16is executed to perform the operations of block 2702.

At block 2704, the apparatus transmits the identifier to the userequipment using RRC signaling.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2704. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2704.

At block 2706, the apparatus receives the uplink control informationand/or the sounding reference signal at the determined tone locations.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2706. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2706.

Twelfth Example Process

FIG. 28 illustrates a process 2800 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 2800 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 1700 of FIG. 17 and/or the process 1800 of FIG. 18. The process2800 may take place within a processing circuit (e.g., the processingcircuit 1610 of FIG. 16), which may be located in a BS, a UE, or someother suitable apparatus. Of course, in various aspects within the scopeof the disclosure, the process 2800 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 2802, an apparatus (e.g., a BS) determines channel informationand/or control information. For example, a BS may determine, for aparticular UE, at least one of: link gain, angle of arrival, angle ofdeparture, or any combination thereof. As another example, a BS mayreceive, for a particular UE, at least one of: CQI, PNI, SR, ACK/NAK, orany combination thereof.

In some implementations, the circuit/module for communicating 1622 ofFIG. 16 performs the operations of block 2802. In some implementations,the code for communicating 1632 of FIG. 16 is executed to perform theoperations of block 2802.

At block 2804, the apparatus determines a quantity of UL control symbolsto be used based on the channel information and/or the controlinformation received at block 2802.

In some implementations, the circuit/module for determining a quantityof symbols based on link gain 1620 of FIG. 16 performs the operations ofblock 2804. In some implementations, the code for determining a quantityof symbols based on link gain 1630 of FIG. 16 is executed to perform theoperations of block 2804.

In some implementations, the circuit/module for determining a quantityof symbols based on payload size 1628 of FIG. 16 performs the operationsof block 2804. In some implementations, the code for determining aquantity of symbols based on payload size 1638 of FIG. 16 is executed toperform the operations of block 2804.

At block 2806, the apparatus allocates the determined quantity ofsymbols in an UL sub-frame for communication of UL control information.In some aspects, the allocation may allocate PUCCH symbols or PUSCHsymbols.

In some implementations, the circuit/module for determining symbollocations 1624 of FIG. 16 performs the operations of block 2806. In someimplementations, the code for determining symbol locations 1634 of FIG.16 is executed to perform the operations of block 2806.

Second Example Apparatus

FIG. 29 illustrates a block diagram of an example hardwareimplementation of an apparatus 2900 configured to communicate accordingto one or more aspects of the disclosure. The apparatus 2900 couldembody or be implemented within a BS, a UE, or some other type of devicethat supports wireless communication. In various implementations, theapparatus 2900 could embody or be implemented within an access terminal,an access point, or some other type of device. In variousimplementations, the apparatus 2900 could embody or be implementedwithin a mobile phone, a smart phone, a tablet, a portable computer, aserver, a personal computer, a sensor, an entertainment device, amedical device, or any other electronic device having circuitry.

The apparatus 2900 includes a communication interface (e.g., at leastone transceiver) 2902, a storage medium 2904, a user interface 2906, amemory device 2908 (e.g., storing uplink control information 2918), anda processing circuit 2910 (e.g., at least one processor). In variousimplementations, the user interface 2906 may include one or more of: akeypad, a display, a speaker, a microphone, a touchscreen display, ofsome other circuitry for receiving an input from or sending an output toa user. The communication interface 2902 may be coupled to one or moreantennas 2912, and may include a transmitter 2914 and a receiver 2916.In general, the components of FIG. 29 may be similar to correspondingcomponents of the apparatus 1600 of FIG. 16.

According to one or more aspects of the disclosure, the processingcircuit 2910 may be adapted to perform any or all of the features,processes, functions, operations and/or routines for any or all of theapparatuses described herein. For example, the processing circuit 2910may be configured to perform any of the steps, functions, and/orprocesses described with respect to FIGS. 30-35. As used herein, theterm “adapted” in relation to the processing circuit 2910 may refer tothe processing circuit 2910 being one or more of configured, employed,implemented, and/or programmed to perform a particular process,function, operation and/or routine according to various featuresdescribed herein.

The processing circuit 2910 may be a specialized processor, such as anapplication-specific integrated circuit (ASIC) that serves as a meansfor (e.g., structure for) carrying out any one of the operationsdescribed in conjunction with FIGS. 30-35. The processing circuit 2910serves as one example of a means for transmitting and/or a means forreceiving. In various implementations, the processing circuit 2910 mayincorporate the functionality of the UE 202 (e.g., the processor 214) orthe base station 204 (e.g., the processor 208) of FIG. 2, the UE 302(e.g., the processor 314) or the base station 304 (e.g., the processor308) of FIG. 3, or the UE 402 or the base station 406 of FIG. 4.

According to at least one example of the apparatus 2900, the processingcircuit 2910 may include one or more of a circuit/module for determininga quantity of beams 2920 or a circuit/module for communicating 2922. Invarious implementations, the circuit/module for determining a quantityof beams 2920 or the circuit/module for communicating 2922 maycorrespond, at least in part, to the functionality of the UE 202 (e.g.,the processor 214) or the base station 204 (e.g., the processor 208) ofFIG. 2, the UE 302 (e.g., the processor 314) or the base station 304(e.g., the processor 308) of FIG. 3, or the UE 402 or the base station406 of FIG. 4.

As mentioned above, programming stored by the storage medium 2904, whenexecuted by the processing circuit 2910, causes the processing circuit2910 to perform one or more of the various functions and/or processoperations described herein. For example, the programming, when executedby the processing circuit 2910, may cause the processing circuit 2910 toperform the various functions, steps, and/or processes described hereinwith respect to FIGS. 30-35 in various implementations. As shown in FIG.29, the storage medium 2904 may include one or more of code fordetermining a quantity of beams 2924 or code for communicating 2926. Invarious implementations, the code for determining a quantity of beams2924 or the code for communicating 2926 may be executed or otherwiseused to provide the functionality described herein for thecircuit/module for determining a quantity of beams 2920 or thecircuit/module for communicating 2922.

The circuit/module for determining a quantity of beams 2920 may includecircuitry and/or programming (e.g., code for determining a quantity ofbeams 2924 stored on the storage medium 2904) adapted to perform severalfunctions relating to, for example, determining a quantity of beams forwhich channel information is transmitted to a base station. In someaspects, the determination may be based on a type of channel used tocarry uplink control information.

In some implementations, the circuit/module for determining a quantityof beams 2920 obtains an indication of the type of channel to be used tocarry the uplink control information (e.g., from the circuit/module forcommunicating 2922, the memory device 2908, the communication interface2902, the receiver 2916, or some other component) or determines the typeof channel itself. The circuit/module for determining a quantity ofbeams 2920 then uses a channel type-to-number table or some othersuitable mapping to determine the number of beams that should havechannel information fed-back in view of the type of channel being usedto carry uplink control information. The circuit/module for determininga quantity of beams 2920 then outputs an indication of the determinedquantity of beams (e.g., to the circuit/module for communicating 2922,the memory device 2908, the communication interface 2902, thetransmitter 2914, or some other component).

In some implementations, the circuit/module for determining a quantityof beams 2920 directly obtains an indication of the quantity of beams(e.g., from the circuit/module for communicating 2922, the memory device2908, the communication interface 2902, the receiver 2916, or some othercomponent). For example, the circuit/module for determining a quantityof beams 2920 may identify a memory location in the memory device 2908that stores the quantity information and invokes a read of that locationto obtain the information. The circuit/module for determining a quantityof beams 2920 then outputs the information (e.g., sends the informationto the circuit/module for communicating 2922, sends the information to aprocess, or sends the information to another component of the apparatus2900).

The circuit/module for communicating 2922 may include circuitry and/orprogramming (e.g., code for communicating 2926 stored on the storagemedium 2904) adapted to perform several functions relating to, forexample, communicating information. In some implementations, thecommunication involves receiving the information. In someimplementations, the communication involves sending (e.g., transmitting)the information.

The information may take different forms in different scenarios. In someaspects, the circuit/module for communicating 2922 may communicateuplink control information (e.g., at particular symbol locations duringa frame and/or at particular tone locations during a frame). In someaspects, the circuit/module for communicating 2922 may communicate anindication that indicates whether a UE is to transmit uplink controlinformation via PUCCH or PUSCH. In some aspects, the circuit/module forcommunicating 2922 may communicate an indication of a quantity of beamsfor which channel information is to be transmitted (e.g., to a basestation).

The communication may involve different signaling in differentscenarios. In some aspects, the circuit/module for communicating 2922may communicate information via radio resource control (RRC) signaling.In some aspects, the circuit/module for communicating 2922 maycommunicate information via a physical downlink control channel (PDCCH).In some aspects, the circuit/module for communicating 2922 maycommunicate information via downlink control information (DCI).

In some implementation, the circuit/module for communicating 2922 mayuse one or more parameters for the communicating. For example, thecircuit/module for communicating 2922 may obtain information abouttiming (e.g., symbol locations) and/or tone locations and communicateinformation at those locations.

In some implementations where the communicating involves receivinginformation, the circuit/module for communicating 2922 receivesinformation (e.g., from the communication interface 2902, the receiver2916, the memory device 2908, some other component of the apparatus2900, or some other device), processes (e.g., decodes) the information,and outputs the information to another component of the apparatus 2900(e.g., the memory device 2908 or some other component). In somescenarios (e.g., if the circuit/module for communicating 2922 includes areceiver), the communicating involves the circuit/module forcommunicating 2922 receiving information directly from a device thattransmitted the information (e.g., via radio frequency signaling or someother type of signaling suitable for the applicable communicationmedium).

In some implementations where the communicating involves sendinginformation, the circuit/module for communicating 2922 obtainsinformation (e.g., from the memory device 2908 or some other componentof the apparatus 2900), processes (e.g., encodes) the information, andoutputs the processed information. In some scenarios, the communicatinginvolves sending the information to another component of the apparatus2900 (e.g., the transmitter 2914, the communication interface 2902, orsome other component) that will transmit the information to anotherdevice. In some scenarios (e.g., if the circuit/module for communicating2922 includes a transmitter), the communicating involves thecircuit/module for communicating 2922 transmitting the informationdirectly to another device (e.g., the ultimate destination) via radiofrequency signaling or some other type of signaling suitable for theapplicable communication medium.

In some implementations, the circuit/module for communicating 2922 is atransceiver. In some implementations, the circuit/module forcommunicating 2922 is a receiver. In some implementations, thecircuit/module for communicating 2922 is a transmitter. In someimplementations, the communication interface 2902 includes thecircuit/module for communicating 2922 and/or the code for communicating2926. In some implementations, the circuit/module for communicating 2922and/or the code for communicating 2926 is configured to control thecommunication interface 2902 (e.g., a transceiver, a receiver, or atransmitter) to communicate the information.

Thirteenth Example Process

FIG. 30 illustrates a process 3000 for communication in accordance withsome aspects of the disclosure. The process 3000 may take place within aprocessing circuit (e.g., the processing circuit 2910 of FIG. 29), whichmay be located in a BS, a UE, or some other suitable apparatus. Ofcourse, in various aspects within the scope of the disclosure, theprocess 3000 may be implemented by any suitable apparatus capable ofsupporting communication-related operations.

At block 3002, an apparatus (e.g., a UE or a BS) determines a quantityof beams for which channel information is transmitted to a base station.In some aspects, the determination may be based on whether uplinkcontrol information (UCI) is transmitted via a physical uplink controlchannel (PUCCH) or a physical uplink shared channel (PUSCH). In someaspects, the beams (e.g., transmitted by a BS and received at a UE) maybe used to communicate a beam reference signal during a coarse sweepand/or a fine sweep.

In some aspects, channel information for a first quantity of beams maybe fed-back to the base station if the uplink control information istransmitted in the PUSCH and channel information for a second quantityof beams may be fed-back to the base station if uplink controlinformation is transmitted in the PUCCH. Here, the first quantity islarger than the second quantity.

The channel information may take different forms in differentimplementations. In some aspects, the channel information may include atleast one of: a received signal strength indicator, reference signalreceived power, reference signal received quality, narrowband channelquality information, or any combination thereof. In some aspects, thechannel information may depend on at least one of: at least oneparameter of a path loss associated with a user equipment (UE), an angleof departure of a signal from the user equipment, an angle of arrival ofa signal at a base station, or any combination thereof. In some aspects,the beams may be for neighboring cells and the channel information mayinclude reference signal received power of the beams.

In some aspects, the beams may be used to communicate at least one of: abeam reference signal, a channel state information reference signal, orany combination thereof. In some aspects, the beam reference signal maybe communicated during a synchronization sub-frame.

In some implementations, the circuit/module for determining a quantityof beams 2920 of FIG. 29 performs the operations of block 3002. In someimplementations, the code for determining a quantity of beams 2930 ofFIG. 29 is executed to perform the operations of block 3002.

At block 3004, the apparatus communicates (e.g., transmits or receives)the channel information for the determined quantity of beams. In someaspects, the communication may be beamformed communication.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3004. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3004.

Fourteenth Example Process

FIG. 31 illustrates a process 3100 for BRS communication in accordancewith some aspects of the disclosure. In some aspects, the process 3100may be performed in conjunction with (e.g., as part of or in additionto) the process 3000 of FIG. 30. The process 3100 may take place withina processing circuit (e.g., the processing circuit 2910 of FIG. 29),which may be located in a UE, a BS, or some other suitable apparatus. Ofcourse, in various aspects within the scope of the disclosure, theprocess 3100 may be implemented by any suitable apparatus capable ofsupporting communication-related operations.

At block 3102, an apparatus (e.g., a UE) receives coarse beams during abeam reference signal (BRS) session.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3102. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3102.

At block 3104, the apparatus determines channel information for each ofthe beams.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3104. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3104.

At optional block 3106, the apparatus may communicate an indication of aquantity of beams for which channel information is to be fed-back. Forexample, a UE may receive, via a physical downlink control channel(PDCCH), downlink control information (DCI), or radio resource control(RRC) signaling, an indication of the quantity of beams for whichchannel information is (e.g., is to be) transmitted to the base station.In some aspects, bits may be reserved in downlink control information(DCI) for the indication of the quantity of beams for which channelinformation is transmitted to the base station.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3106. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3106.

At optional block 3108, the apparatus may receive an indication of theuplink channel (e.g., PUCCH or PUSCH) on which uplink controlinformation is to be sent. For example, a UE may receive an indicationfrom a base station via a physical downlink control channel (PDCCH),downlink control information (DCI), or radio resource control (RRC)signaling. In some aspects, the indication may indicate whether a userequipment (UE) is to transmit the uplink control information via thePUCCH or the PUSCH.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3108. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3108.

At block 3110, the apparatus determines a quantity of beams for whichchannel information is to be fed-back. In some aspects, thedetermination may be based on a received indication of quantity ofbeams, based on determined channel information, or based on an uplinkchannel on which uplink control information is to be sent.

In some implementations, the circuit/module for determining a quantityof beams 2920 of FIG. 29 performs the operations of block 3110. In someimplementations, the code for determining a quantity of beams 2930 ofFIG. 29 is executed to perform the operations of block 3110.

At block 3112, the apparatus sends channel information feedback for thedetermined quantity of beams. In some aspects, the feedback may be sentvia, for example, PUCCH or PUSCH.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3112. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3112.

Fifteenth Example Process

FIG. 32 illustrates a process 3200 for CSI-RS communication inaccordance with some aspects of the disclosure. In some aspects, theprocess 3200 may be performed in conjunction with (e.g., as part of orin addition to) the process 3000 of FIG. 30. The process 3200 may takeplace within a processing circuit (e.g., the processing circuit 2910 ofFIG. 29), which may be located in a UE, a BS, or some other suitableapparatus. Of course, in various aspects within the scope of thedisclosure, the process 3200 may be implemented by any suitableapparatus capable of supporting communication-related operations.

At block 3202, an apparatus (e.g., a UE) receives fine beams during achannel state information—reference signal (CSI-RS) session.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3202. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3202.

At block 3204, the apparatus determines channel information for each ofthe beams.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3204. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3204.

At optional block 3206, the apparatus may communicate an indication of aquantity of beams for which channel information is to be fed-back. Forexample, a UE may receive, via a physical downlink control channel(PDCCH), downlink control information (DCI), or radio resource control(RRC) signaling, an indication of the quantity of beams for whichchannel information is (e.g., is to be) transmitted to the base station.In some aspects, bits may be reserved in downlink control information(DCI) for the indication of the quantity of beams for which channelinformation is transmitted to the base station.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3206. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3206.

At optional block 3208, the apparatus may receive an indication of theuplink channel (e.g., PUCCH or PUSCH) on which uplink controlinformation is to be sent. For example, a UE may receive an indicationfrom a base station via a physical downlink control channel (PDCCH),downlink control information (DCI), or radio resource control (RRC)signaling. In some aspects, the indication may indicate whether a userequipment (UE) is to transmit the uplink control information via thePUCCH or the PUSCH.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3208. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3208.

At block 3210, the apparatus determines a quantity of beams for whichchannel information is to be fed-back. In some aspects, thedetermination may be based on a received indication of quantity ofbeams, based on determined channel information, or based on an uplinkchannel on which uplink control information is to be sent.

In some implementations, the circuit/module for determining a quantityof beams 2920 of FIG. 29 performs the operations of block 3210. In someimplementations, the code for determining a quantity of beams 2930 ofFIG. 29 is executed to perform the operations of block 3210.

At block 3212, the apparatus sends channel information feedback for thedetermined quantity of beams. In some aspects, the feedback may be sentvia, for example, PUCCH or PUSCH.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3212. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3212.

Sixteenth Example Process

FIG. 33 illustrates a process 3300 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 3300 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 3000 of FIG. 30. The process 3300 may take place within aprocessing circuit (e.g., the processing circuit 2910 of FIG. 29), whichmay be located in a BS, a UE, or some other suitable apparatus. Ofcourse, in various aspects within the scope of the disclosure, theprocess 3300 may be implemented by any suitable apparatus capable ofsupporting communication-related operations.

At block 3302, an apparatus (e.g., a BS) sends coarse beams. Forexample, a BS may send the course beams during a BRS session. The BRSmay be sent during a synchronization sub-frame.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3302. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3302.

At block 3304, the apparatus receives channel information feedback forBRS.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3304. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3304.

At block 3306, the apparatus sends fine beams. For example, a BS maysend fine beams while transmitting a CSI-RS session.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3306. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3306.

At block 3308, the apparatus receives channel information feedback forCSI-RS.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3308. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3308.

At block 3310, the apparatus schedules a best beam based on the channelinformation feedback.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3310. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3310.

Seventeenth Example Process

FIG. 34 illustrates a process 3400 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 3400 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 3000 of FIG. 30. The process 3400 may take place within aprocessing circuit (e.g., the processing circuit 2910 of FIG. 29), whichmay be located in a BS, a UE, or some other suitable apparatus. Ofcourse, in various aspects within the scope of the disclosure, theprocess 3400 may be implemented by any suitable apparatus capable ofsupporting communication-related operations.

At block 3402, an apparatus (e.g., a BS) determines a quantity of beamsfor which channel information is to be fed-back. For example, a BS maymake this determination based on which channel is used to send uplinkcontrol information, based on link gain, or based on some other factor.

In some implementations, the circuit/module for determining a quantityof beams 2920 of FIG. 29 performs the operations of block 3402. In someimplementations, the code for determining a quantity of beams 2930 ofFIG. 29 is executed to perform the operations of block 3402.

At block 3404, the apparatus sends an indication of the quantity ofbeams for which channel information is to be fed-back. For example, a BSmay send this indication to a UE.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3404. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3404.

Eighteenth Example Process

FIG. 35 illustrates a process 3500 for communication in accordance withsome aspects of the disclosure. In some aspects, the process 3500 may beperformed in conjunction with (e.g., as part of or in addition to) theprocess 3000 of FIG. 30. The process 3500 may take place within aprocessing circuit (e.g., the processing circuit 2910 of FIG. 29), whichmay be located in a BS, a UE, or some other suitable apparatus. Ofcourse, in various aspects within the scope of the disclosure, theprocess 3500 may be implemented by any suitable apparatus capable ofsupporting communication-related operations.

At block 3502, an apparatus (e.g., a BS) selects an UL channel on whichcontrol information is to be sent. For example, a BS may select PUCCH orPUSCH.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3502. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3502.

At block 3504, the apparatus sends an indication of the UL channelselected at block 3502. For example, a base station may send theindication to a user equipment (UE) via a physical downlink controlchannel (PDCCH), downlink control information (DCI), or radio resourcecontrol (RRC) signaling. In some aspects, the indication may indicatewhether the UE is to transmit the uplink control information via thePUCCH or the PUSCH. In some aspects, separate bits may be reserved indownlink control information (DCI) formats to indicate whether the UE isto transmit the uplink control information via the PUCCH or the PUSCH.

In some implementations, the circuit/module for communicating 2922 ofFIG. 29 performs the operations of block 3504. In some implementations,the code for communicating 2926 of FIG. 29 is executed to perform theoperations of block 3504.

Additional Aspects

Many aspects are described in terms of sequences of actions to beperformed by, for example, elements of a computing device. It will berecognized that various actions described herein can be performed byspecific circuits, for example, central processing units (CPUs), graphicprocessing units (GPUs), digital signal processors (DSPs),application-specific integrated circuits (ASICs), field programmablegate arrays (FPGAs), or various other types of general purpose orspecial purpose processors or circuits, by program instructions beingexecuted by one or more processors, or by a combination of both.Additionally, these sequence of actions described herein can beconsidered to be embodied entirely within any form of computer readablestorage medium having stored therein a corresponding set of computerinstructions that upon execution would cause an associated processor toperform the functionality described herein. Thus, the various aspects ofthe disclosure may be embodied in a number of different forms, all ofwhich have been contemplated to be within the scope of the claimedsubject matter. In addition, for each of the aspects described herein,the corresponding form of any such aspects may be described herein as,for example, “logic configured to” perform the described action.

Those of skill in the art will appreciate that information and signalsmay be represented using any of a variety of different technologies andtechniques. For example, data, instructions, commands, information,signals, bits, symbols, and chips that may be referenced throughout theabove description may be represented by voltages, currents,electromagnetic waves, magnetic fields or particles, optical fields orparticles, or any combination thereof.

Further, those of skill in the art will appreciate that the variousillustrative logical blocks, modules, circuits, and algorithm stepsdescribed in connection with the aspects disclosed herein may beimplemented as electronic hardware, computer software, or combinationsof both. To clearly illustrate this interchangeability of hardware andsoftware, various illustrative components, blocks, modules, circuits,and steps have been described above generally in terms of theirfunctionality. Whether such functionality is implemented as hardware orsoftware depends upon the particular application and design constraintsimposed on the overall system. Skilled artisans may implement thedescribed functionality in varying ways for each particular application,but such implementation decisions should not be interpreted as causing adeparture from the scope of the disclosure.

One or more of the components, steps, features and/or functionsillustrated in above may be rearranged and/or combined into a singlecomponent, step, feature or function or embodied in several components,steps, or functions. Additional elements, components, steps, and/orfunctions may also be added without departing from novel featuresdisclosed herein. The apparatus, devices, and/or components illustratedabove may be configured to perform one or more of the methods, features,or steps described herein. The novel algorithms described herein mayalso be efficiently implemented in software and/or embedded in hardware.

It is to be understood that the specific order or hierarchy of steps inthe methods disclosed is an illustration of example processes. Basedupon design preferences, it is understood that the specific order orhierarchy of steps in the methods may be rearranged. The accompanyingmethod claims present elements of the various steps in a sample order,and are not meant to be limited to the specific order or hierarchypresented unless specifically recited therein.

The methods, sequences or algorithms described in connection with theaspects disclosed herein may be embodied directly in hardware, in asoftware module executed by a processor, or in a combination of the two.A software module may reside in RAM memory, flash memory, ROM memory,EPROM memory, EEPROM memory, registers, hard disk, a removable disk, aCD-ROM, or any other form of storage medium known in the art. An exampleof a storage medium is coupled to the processor such that the processorcan read information from, and write information to, the storage medium.In the alternative, the storage medium may be integral to the processor.

The word “exemplary” is used herein to mean “serving as an example,instance, or illustration.” Any aspect described herein as “exemplary”is not necessarily to be construed as preferred or advantageous overother aspects. Likewise, the term “aspects” does not require that allaspects include the discussed feature, advantage or mode of operation.

The terminology used herein is for the purpose of describing particularaspects only and is not intended to be limiting of the aspects. As usedherein, the singular forms “a,” “an” and “the” are intended to includethe plural forms as well, unless the context clearly indicatesotherwise. It will be further understood that the terms “comprises,”“comprising,” “includes” or “including,” when used herein, specify thepresence of stated features, integers, steps, operations, elements, orcomponents, but do not preclude the presence or addition of one or moreother features, integers, steps, operations, elements, components, orgroups thereof. Moreover, it is understood that the word “or” has thesame meaning as the Boolean operator “OR,” that is, it encompasses thepossibilities of “either” and “both” and is not limited to “exclusiveor” (“XOR”), unless expressly stated otherwise. It is also understoodthat the symbol “/” between two adjacent words has the same meaning as“or” unless expressly stated otherwise. Moreover, phrases such as“connected to,” “coupled to” or “in communication with” are not limitedto direct connections unless expressly stated otherwise.

Any reference to an element herein using a designation such as “first,”“second,” and so forth does not generally limit the quantity or order ofthose elements. Rather, these designations may be used herein as aconvenient method of distinguishing between two or more elements orinstances of an element. Thus, a reference to first and second elementsdoes not mean that only two elements may be employed there or that thefirst element must precede the second element in some manner. Also,unless stated otherwise a set of elements may comprise one or moreelements. In addition, terminology of the form “at least one of a, b, orc” or “one or more of a, b, or c” used in the description or the claimsmeans “a or b or c or any combination of these elements.” For example,this terminology may include a, or b, or c, or a and b, or a and c, or aand b and c, or 2a, or 2b, or 2c, or 2a and b, and so on.

As used herein, the term “determining” encompasses a wide variety ofactions. For example, “determining” may include calculating, computing,processing, deriving, investigating, looking up (e.g., looking up in atable, a database or another data structure), ascertaining, and thelike. Also, “determining” may include receiving (e.g., receivinginformation), accessing (e.g., accessing data in a memory), and thelike. Also, “determining” may include resolving, selecting, choosing,establishing, and the like.

While the foregoing disclosure shows illustrative aspects, it should benoted that various changes and modifications could be made hereinwithout departing from the scope of the appended claims. The functions,steps or actions of the method claims in accordance with aspectsdescribed herein need not be performed in any particular order unlessexpressly stated otherwise. Furthermore, although elements may bedescribed or claimed in the singular, the plural is contemplated unlesslimitation to the singular is explicitly stated.

What is claimed is:
 1. A method for wireless communication at a userequipment, comprising: receiving a plurality of beam reference signalsfrom a base station via at least a portion of a plurality of directionalbeams; receiving from the base station an indication of a selection bythe base station of a channel for transmission of uplink controlinformation including channel information derived from the plurality ofbeam reference signals to the base station, wherein the selection isbetween a physical uplink control channel (PUCCH) and a physical uplinkshared channel (PUSCH), wherein the channel information comprises afirst type of information if the indication indicates that the PUSCH isselected, the channel information comprises a second type of informationif the indication indicates that the PUCCH is selected, and the firsttype of information is different from the second type of information;determining a quantity of the plurality of directional beams for whichthe user equipment is to transmit the channel information to the basestation, wherein the determining the quantity of the plurality ofdirectional beams comprises determining whether the user equipment willreport channel information for more than one beam, and wherein thechannel information depends on at least one of: a path loss associatedwith the base station, an angle of departure of a signal from the basestation, an angle of arrival of a signal at the user equipment, or anycombination thereof; and sending the channel information to the basestation according to the indication.
 2. The method of claim 1, wherein:the channel information comprises at least one of: a received signalstrength indicator, reference signal received power, reference signalreceived quality, narrowband channel quality information, or anycombination thereof.
 3. The method of claim 1, wherein: the determiningthe quantity of the plurality of directional beams for which the userequipment is to transmit the channel information comprises selecting afirst quantity of the plurality of directional beams if the indicationindicates that the PUSCH is selected and selecting a second quantity ofthe plurality of directional beams if the indication indicates that thePUCCH is selected.
 4. The method of claim 1, further comprising:determining the channel information.
 5. The method of claim 4, wherein:the channel information comprises first channel information for a firstquantity of the plurality of directional beams if the indicationindicates that the PUSCH is selected; the channel information comprisessecond channel information for a second quantity of the plurality ofdirectional beams if the indication indicates that the PUCCH isselected; and the first channel information is different from the secondchannel information.
 6. The method of claim 4, wherein: the channelinformation comprises first reference signal information for a firstquantity of the plurality of directional beams if the indicationindicates that the PUSCH is selected; the channel information comprisessecond reference signal information for a second quantity of theplurality of directional beams if the indication indicates that thePUCCH is selected; and the first reference signal information isdifferent from the second reference signal information.
 7. The method ofclaim 1, further comprising determining the channel information,wherein: if the indication indicates that the PUSCH is selected, thechannel information comprises first reference signal information for afirst quantity of the plurality of directional beams and the determiningthe quantity of the plurality of directional beams comprises selectingthe first quantity of the plurality of directional beams; and if theindication indicates that the PUCCH is selected, the channel informationcomprises second reference signal information for a second quantity ofthe plurality of directional beams and the determining the quantity ofthe plurality of directional beams comprises selecting the secondquantity of the plurality of directional beams.
 8. The method of claim1, wherein the plurality of beam reference signals are received during asynchronization sub-frame.
 9. The method of claim 1, wherein theplurality of beam reference signals comprise channel state informationreference signals.
 10. The method of claim 1, wherein the indicationcomprises bits in downlink control information (DCI).
 11. The method ofclaim 1, wherein the indication is received via radio resource control(RRC) signaling.
 12. The method of claim 1, wherein the indication isreceived via a physical downlink control information.
 13. The method ofclaim 1, wherein the indication is received via a physical downlinkcontrol channel (PDCCH).
 14. The method of claim 1, wherein thedetermining the quantity of the plurality of directional beams for whichthe user equipment is to transmit the channel information to the basestation comprises: identifying, based on the indication of the selectionof the channel for transmission of uplink control information to thebase station, at least two directional beams for which the userequipment is to transmit the channel information to the base station viathe PUCCH or the PUSCH.
 15. The method of claim 1, wherein the uplinkcontrol information comprises at least one of: channel qualityinformation, precoding matrix information, a scheduling request,acknowledgement information, channel information for a plurality ofbeams, or any combination thereof.
 16. A user equipment for wirelesscommunication comprising: a memory device; and a processing circuitcoupled to the memory device and configured to: receive a plurality ofbeam reference signals from a base station via at least a portion of aplurality of directional beams, receive from the base station anindication of a selection by the base station of a channel fortransmission of uplink control information including channel informationderived from the plurality of beam reference signals to the basestation, wherein the selection is between a physical uplink controlchannel (PUCCH) and a physical uplink shared channel (PUSCH), whereinthe channel information comprises a first type of information if theindication indicates that the PUSCH is selected, the channel informationcomprises a second type of information if the indication indicates thatthe PUCCH is selected, and the first type of information is differentfrom the second type of information, determine a quantity of theplurality of directional beams for which the user equipment is totransmit the channel information to the base station, wherein thedetermination of the quantity of the plurality of directional beamscomprises a determination of whether the user equipment will reportchannel information for more than one beam, and wherein the channelinformation depends on at least one of: a path loss associated with thebase station, an angle of departure of a signal from the base station,an angle of arrival of a signal at the user equipment, or anycombination thereof, and send the channel information to the basestation according to the indication.
 17. The user equipment of claim 16,wherein: the channel information comprises at least one of: a receivedsignal strength indicator, reference signal received power, referencesignal received quality, narrowband channel quality information, or anycombination thereof.
 18. The user equipment of claim 16, wherein: thedetermination of the quantity of the plurality of directional beams forwhich the user equipment is to transmit the channel informationcomprises selection of a first quantity of the plurality of directionalbeams if the indication indicates that the PUSCH is selected andselection of a second quantity of the plurality of directional beams ifthe indication indicates that the PUCCH is selected; and the firstquantity is larger than the second quantity.
 19. The user equipment ofclaim 18, wherein: the processing circuit is further configured todetermine the channel information; the channel information comprisesfirst reference signal information for the first quantity of theplurality of directional beams if the indication indicates that thePUSCH is selected; the channel information comprises second referencesignal information for the second quantity of the plurality ofdirectional beams if the indication indicates that the PUCCH isselected; and the first reference signal information is different fromthe second reference signal information.
 20. The user equipment of claim16, wherein the plurality of beam reference signals are received duringa synchronization sub-frame.
 21. The user equipment of claim 16, whereinthe indication is received via radio resource control (RRC) signaling.22. The user equipment of claim 16, wherein the plurality of beamreference signals communicate a beam reference signal during a coarsesweep.
 23. The user equipment of claim 16, wherein the plurality of beamreference signals communicate a channel state information referencesignal during a fine sweep.
 24. A user equipment for wirelesscommunication comprising: means for receiving a plurality of beamreference signals from a base station via at least a portion of aplurality of directional beams; means for receiving from the basestation an indication of a selection by the base station of a channelfor transmission of uplink control information including channelinformation derived from the plurality of beam reference signals to thebase station, wherein the selection is between a physical uplink controlchannel (PUCCH) and a physical uplink shared channel (PUSCH), whereinthe channel information comprises a first type of information if theindication indicates that the PUSCH is selected, the channel informationcomprises a second type of information if the indication indicates thatthe PUCCH is selected, and the first type of information is differentfrom the second type of information; means for determining a quantity ofthe plurality of directional beams for which the user equipment is totransmit the channel information to the base station, wherein thedetermining the quantity of the plurality of directional beams comprisesdetermining whether the user equipment will report channel informationfor more than one beam, and wherein the channel information depends onat least one of: a path loss associated with the base station, an angleof departure of a signal from the base station, an angle of arrival of asignal at the user equipment, or any combination thereof; and means forsending the channel information to the base station according to theindication.
 25. The user equipment of claim 24, wherein: the channelinformation comprises at least one of: a received signal strengthindicator, reference signal received power, reference signal receivedquality, narrowband channel quality information, or any combinationthereof.
 26. The user equipment of claim 24, wherein: the determiningthe quantity of the plurality of directional beams for which the userequipment is to transmit the channel information comprises selecting afirst quantity of the plurality of directional beams if the indicationindicates that the PUSCH is selected and selecting a second quantity ofthe plurality of directional beams if the indication indicates that thePUCCH is selected.
 27. The user equipment of claim 24, furthercomprising: means for determining the channel information.
 28. The userequipment of claim 27, wherein: the channel information comprises atleast one of: a received signal strength indicator, reference signalreceived power, reference signal received quality, narrowband channelquality information, or any combination thereof; and the determining thequantity of the plurality of directional beams for which the userequipment is to transmit the channel information comprises selecting afirst quantity of the plurality of directional beams if the indicationindicates that the PUSCH is selected and selecting a second quantity ofthe plurality of directional beams if the indication indicates that thePUCCH is selected.
 29. The user equipment of claim 28, wherein differentbeam reference signals of the plurality of beam reference signals arereceived via different directions.
 30. A non-transitorycomputer-readable medium storing computer-executable code for wirelesscommunication by a user equipment, including code to: receive aplurality of beam reference signals from a base station via at least aportion of a plurality of directional beams; receive from the basestation an indication of a selection by the base station of a channelfor transmission of uplink control information including channelinformation derived from the plurality of beam reference signals to thebase station, wherein the selection is between a physical uplink controlchannel (PUCCH) and a physical uplink shared channel (PUSCH), whereinthe channel information comprises a first type of information if theindication indicates that the PUSCH is selected, the channel informationcomprises a second type of information if the indication indicates thatthe PUCCH is selected, and the first type of information is differentfrom the second type of information; determine a quantity of theplurality of directional beams for which the user equipment is totransmit the channel information to the base station, wherein thedetermination of the quantity of the plurality of directional beamscomprises a determination of whether the user equipment will reportchannel information for more than one beam, and wherein the channelinformation depends on at least one of: a path loss associated with thebase station, an angle of departure of a signal from the base station,an angle of arrival of a signal at the user equipment, or anycombination thereof; and send the channel information to the basestation according to the indication.